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Mac Forum / Programming / Mac Programming / May 2007stringWithContentsOfFile question
Using stringWithContentsOfFile I can load an NSString with the contents of a file (obviously). What are the practical limits with regard to the size of file that could be handled? Jim  SignatureFind me at http://www.ursaMinorBeta.co.uk My lucky star is probably Eta Carinae. > Using stringWithContentsOfFile I can load an NSString with the contents > of a file (obviously). [quoted text clipped - 3 lines] > > Jim The NSString documentation references this from NSString.h NSMaximumStringLength A constant to define the maximum number of characters in an NSString object. #define NSMaximumStringLength (INT_MAX-1) The practical limits I would expect are dependent quite a bit on the specific machine and the amount of space available in the process's address space; I wouldn't necessarily expect great performance handling a 3GB string on a machine with 512MB of RAM, for example. >> Using stringWithContentsOfFile I can load an NSString with the contents >> of a file (obviously). [quoted text clipped - 17 lines] > address space; I wouldn't necessarily expect great performance handling > a 3GB string on a machine with 512MB of RAM, for example. Overall performance would be a major factor for me, and I expect the largest file I'd be handling this way would be in the 1GB region, but mostly in the 250MB range. Thanks for the info. Jim SignatureFind me at http://www.ursaMinorBeta.co.uk My lucky star is probably Eta Carinae. > Overall performance would be a major factor for me, and I expect the > largest file I'd be handling this way would be in the 1GB region, but > mostly in the 250MB range. Depending on what you're doing with these files, you might want to consider loading them as memory-mapped files. NSData objects can be initialized this way, and you should be able to get an NSString from there. SignatureTom "Tom" Harrington MondoMouse makes your mouse mightier See http://www.atomicbird.com/mondomouse/ |
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